as workaround:
after changes are made in "dia" :
Sarah,
I'm not aware of any way to import these; the closest thing I know of is the Gliffy Plugin.
As far as options, in order of preference I'd try this:
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.